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Ambient temperature and coronary heart disease mortality in Beijing, China: a time series study

BACKGROUND: Many studies have examined the association between ambient temperature and mortality. However, less evidence is available on the temperature effects on coronary heart disease (CHD) mortality, especially in China. In this study, we examined the relationship between ambient temperature and...

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Autores principales: Tian, Zhaoxing, Li, Shanshan, Zhang, Jinliang, Jaakkola, Jouni Jk, Guo, Yuming
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2012
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3490736/
https://www.ncbi.nlm.nih.gov/pubmed/22909034
http://dx.doi.org/10.1186/1476-069X-11-56
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author Tian, Zhaoxing
Li, Shanshan
Zhang, Jinliang
Jaakkola, Jouni Jk
Guo, Yuming
author_facet Tian, Zhaoxing
Li, Shanshan
Zhang, Jinliang
Jaakkola, Jouni Jk
Guo, Yuming
author_sort Tian, Zhaoxing
collection PubMed
description BACKGROUND: Many studies have examined the association between ambient temperature and mortality. However, less evidence is available on the temperature effects on coronary heart disease (CHD) mortality, especially in China. In this study, we examined the relationship between ambient temperature and CHD mortality in Beijing, China during 2000 to 2011. In addition, we compared time series and time-stratified case-crossover models for the non-linear effects of temperature. METHODS: We examined the effects of temperature on CHD mortality using both time series and time-stratified case-crossover models. We also assessed the effects of temperature on CHD mortality by subgroups: gender (female and male) and age (age > =65 and age < 65). We used a distributed lag non-linear model to examine the non-linear effects of temperature on CHD mortality up to 15 lag days. We used Akaike information criterion to assess the model fit for the two designs. RESULTS: The time series models had a better model fit than time-stratified case-crossover models. Both designs showed that the relationships between temperature and group-specific CHD mortality were non-linear. Extreme cold and hot temperatures significantly increased the risk of CHD mortality. Hot effects were acute and short-term, while cold effects were delayed by two days and lasted for five days. The old people and women were more sensitive to extreme cold and hot temperatures than young and men. CONCLUSIONS: This study suggests that time series models performed better than time-stratified case-crossover models according to the model fit, even though they produced similar non-linear effects of temperature on CHD mortality. In addition, our findings indicate that extreme cold and hot temperatures increase the risk of CHD mortality in Beijing, China, particularly for women and old people.
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spelling pubmed-34907362012-11-07 Ambient temperature and coronary heart disease mortality in Beijing, China: a time series study Tian, Zhaoxing Li, Shanshan Zhang, Jinliang Jaakkola, Jouni Jk Guo, Yuming Environ Health Research BACKGROUND: Many studies have examined the association between ambient temperature and mortality. However, less evidence is available on the temperature effects on coronary heart disease (CHD) mortality, especially in China. In this study, we examined the relationship between ambient temperature and CHD mortality in Beijing, China during 2000 to 2011. In addition, we compared time series and time-stratified case-crossover models for the non-linear effects of temperature. METHODS: We examined the effects of temperature on CHD mortality using both time series and time-stratified case-crossover models. We also assessed the effects of temperature on CHD mortality by subgroups: gender (female and male) and age (age > =65 and age < 65). We used a distributed lag non-linear model to examine the non-linear effects of temperature on CHD mortality up to 15 lag days. We used Akaike information criterion to assess the model fit for the two designs. RESULTS: The time series models had a better model fit than time-stratified case-crossover models. Both designs showed that the relationships between temperature and group-specific CHD mortality were non-linear. Extreme cold and hot temperatures significantly increased the risk of CHD mortality. Hot effects were acute and short-term, while cold effects were delayed by two days and lasted for five days. The old people and women were more sensitive to extreme cold and hot temperatures than young and men. CONCLUSIONS: This study suggests that time series models performed better than time-stratified case-crossover models according to the model fit, even though they produced similar non-linear effects of temperature on CHD mortality. In addition, our findings indicate that extreme cold and hot temperatures increase the risk of CHD mortality in Beijing, China, particularly for women and old people. BioMed Central 2012-08-21 /pmc/articles/PMC3490736/ /pubmed/22909034 http://dx.doi.org/10.1186/1476-069X-11-56 Text en Copyright ©2012 Tian et al.; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research
Tian, Zhaoxing
Li, Shanshan
Zhang, Jinliang
Jaakkola, Jouni Jk
Guo, Yuming
Ambient temperature and coronary heart disease mortality in Beijing, China: a time series study
title Ambient temperature and coronary heart disease mortality in Beijing, China: a time series study
title_full Ambient temperature and coronary heart disease mortality in Beijing, China: a time series study
title_fullStr Ambient temperature and coronary heart disease mortality in Beijing, China: a time series study
title_full_unstemmed Ambient temperature and coronary heart disease mortality in Beijing, China: a time series study
title_short Ambient temperature and coronary heart disease mortality in Beijing, China: a time series study
title_sort ambient temperature and coronary heart disease mortality in beijing, china: a time series study
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3490736/
https://www.ncbi.nlm.nih.gov/pubmed/22909034
http://dx.doi.org/10.1186/1476-069X-11-56
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